Dec 18, 2012 11:30pm PST
building told us they were patted down before they were allowed to leave. >> we started clearing the building, and looking for the suspect or a person matching that description that was given to us. did not, did not find anyone matching that description. >> officers gave the all clear just before 8:00. the suspect description was vague and officers say they haven't been able to track the original 911 call. school officials say the large police response was warranted. >> i don't think you can ever call anything to this nature an overreaction in the day and age we live in. any time we receive a possible threat on campus we have to take it seriously. >> reporter: the campus president told us they don't have surveillance cameras but are in the process of tracking them down. reporting live in san jose, matt keller. >>> now to robert honda, he's been talking to students who have been locked down for hours some on their graduation night, robert. >> reporter: that's right, it was supposed to be a night of celebrations or at least that was the plan. the scene of police officers and s.w.a.